Muito obrigado!
De fato, esqueci de adicionar o snippet.
Infelizmente, recebo o seguinte erro:
Aws::S3::Errors::InvalidArgument: Argumento inválido.
Isso é muito consistente com o erro que recebi ao usar a Interface Web, mas não há muito com o que trabalhar para resolver o problema…
Encontrei este tópico que sugere que pode haver uma incompatibilidade com o Google Storage em comparação com o Amazon S3.
Isso pode estar quebrado para o Google Storage?
Pilha completa ao executar a tarefa manualmente:
root@discourse-2-app:/var/www/discourse# sudo -E -u discourse bundle exec rake s3:upload_assets --trace
** Invoke s3:upload_assets (first_time)
** Invoke environment (first_time)
** Execute environment
** Invoke s3:ensure_cors_rules (first_time)
** Invoke environment
** Execute s3:ensure_cors_rules
Instalando regras CORS...
pulando
** Execute s3:upload_assets
Uploading: assets/docker-manager-app-ecd2975f42c4096057a046c086d6a43905c8a18442900d5293ae9a3489422bb0.js
rake aborted!
Aws::S3::Errors::InvalidArgument: Argumento inválido.
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/aws-sdk-core-3.130.2/lib/seahorse/client/plugins/raise_response_errors.rb:17:in `call'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/aws-sdk-s3-1.114.0/lib/aws-sdk-s3/plugins/sse_cpk.rb:24:in `call'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/aws-sdk-s3-1.114.0/lib/aws-sdk-s3/plugins/dualstack.rb:27:in `call'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/aws-sdk-s3-1.114.0/lib/aws-sdk-s3/plugins/accelerate.rb:56:in `call'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/aws-sdk-core-3.130.2/lib/aws-sdk-core/plugins/checksum_algorithm.rb:111:in `call'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/aws-sdk-core-3.130.2/lib/aws-sdk-core/plugins/jsonvalue_converter.rb:22:in `call'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/aws-sdk-core-3.130.2/lib/aws-sdk-core/plugins/idempotency_token.rb:19:in `call'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/aws-sdk-core-3.130.2/lib/aws-sdk-core/plugins/param_converter.rb:26:in `call'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/aws-sdk-core-3.130.2/lib/seahorse/client/plugins/request_callback.rb:71:in `call'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/aws-sdk-core-3.130.2/lib/aws-sdk-core/plugins/response_paging.rb:12:in `call'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/aws-sdk-core-3.130.2/lib/seahorse/client/plugins/response_target.rb:24:in `call'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/aws-sdk-core-3.130.2/lib/seahorse/client/request.rb:72:in `send_request'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/aws-sdk-s3-1.114.0/lib/aws-sdk-s3/client.rb:12369:in `put_object'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/aws-sdk-s3-1.114.0/lib/aws-sdk-s3/object.rb:1472:in `put'
/var/www/discourse/lib/s3_helper.rb:75:in `upload'
/var/www/discourse/lib/tasks/s3.rake:37:in `block in upload'
/var/www/discourse/lib/tasks/s3.rake:36:in `open'
/var/www/discourse/lib/tasks/s3.rake:36:in `upload'
/var/www/discourse/lib/tasks/s3.rake:192:in `block (2 levels) in <main>'
/var/www/discourse/lib/tasks/s3.rake:191:in `each'
/var/www/discourse/lib/tasks/s3.rake:191:in `block in <main>'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/rake-13.0.6/lib/rake/task.rb:281:in `block in execute'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/rake-13.0.6/lib/rake/task.rb:281:in `each'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/rake-13.0.6/lib/rake/task.rb:281:in `execute'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/rake-13.0.6/lib/rake/task.rb:219:in `block in invoke_with_call_chain'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/rake-13.0.6/lib/rake/task.rb:199:in `synchronize'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/rake-13.0.6/lib/rake/task.rb:199:in `invoke_with_call_chain'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/rake-13.0.6/lib/rake/task.rb:188:in `invoke'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/rake-13.0.6/lib/rake/application.rb:160:in `invoke_task'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/rake-13.0.6/lib/rake/application.rb:116:in `block (2 levels) in top_level'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/rake-13.0.6/lib/rake/application.rb:116:in `each'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/rake-13.0.6/lib/rake/application.rb:116:in `block in top_level'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/rake-13.0.6/lib/rake/application.rb:125:in `run_with_threads'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/rake-13.0.6/lib/rake/application.rb:110:in `top_level'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/rake-13.0.6/lib/rake/application.rb:83:in `block in run'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/rake-13.0.6/lib/rake/application.rb:186:in `standard_exception_handling'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/rake-13.0.6/lib/rake/application.rb:80:in `run'
/var/www/discourse/vendor/bundle/ruby/2.7.0/exe/rake:27:in `<top (required)>'
/var/www/discourse/vendor/bundle/ruby/2.7.0/bin/rake:25:in `load'
/var/www/discourse/vendor/bundle/ruby/2.7.0/bin/rake:25:in `<top (required)>'
/usr/local/lib/ruby/gems/2.7.0/gems/bundler-2.3.20/lib/bundler/cli/exec.rb:58:in `load'
/usr/local/lib/ruby/gems/2.7.0/gems/bundler-2.3.20/lib/bundler/cli/exec.rb:58:in `kernel_load'
/usr/local/lib/ruby/gems/2.7.0/gems/bundler-2.3.20/lib/bundler/cli/exec.rb:23:in `run'
/usr/local/lib/ruby/gems/2.7.0/gems/bundler-2.3.20/lib/bundler/cli.rb:485:in `exec'
/usr/local/lib/ruby/gems/2.7.0/gems/bundler-2.3.20/lib/bundler/vendor/thor/lib/thor/command.rb:27:in `run'
/usr/local/lib/ruby/gems/2.7.0/gems/bundler-2.3.20/lib/bundler/vendor/thor/lib/thor/invocation.rb:127:in `invoke_command'
/usr/local/lib/ruby/gems/2.7.0/gems/bundler-2.3.20/lib/bundler/vendor/thor/lib/thor.rb:392:in `dispatch'
/usr/local/lib/ruby/gems/2.7.0/gems/bundler-2.3.20/lib/bundler/cli.rb:31:in `dispatch'
/usr/local/lib/ruby/gems/2.7.0/gems/bundler-2.3.20/lib/bundler/vendor/thor/lib/thor/base.rb:485:in `start'
/usr/local/lib/ruby/gems/2.7.0/gems/bundler-2.3.20/lib/bundler/cli.rb:25:in `start'
/usr/local/lib/ruby/gems/2.7.0/gems/bundler-2.3.20/exe/bundle:48:in `block in <top (required)>'
/usr/local/lib/ruby/gems/2.7.0/gems/bundler-2.3.20/lib/bundler/friendly_errors.rb:120:in `with_friendly_errors'
/usr/local/lib/ruby/gems/2.7.0/gems/bundler-2.3.20/exe/bundle:36:in `<top (required)>'
/usr/local/bin/bundle:25:in `load'
/usr/local/bin/bundle:25:in `<main>'
Tasks: TOP => s3:upload_assets
PS: Não estou considerando mudar de bucket, mas me pergunto o que aconteceria com as imagens previamente carregadas no disco da VM.
EDIT (RESOLVIDO):
@gerhard @Falco
Descobri qual era o problema ativando o http_wire_trace.
A resposta de argumento inválido do googleapis explica:
Não é possível inserir ACL legado para um objeto quando o acesso uniforme em nível de bucket está ativado. Leia mais em Uniform bucket-level access | Cloud Storage | Google Cloud
Ativei a ACL granular no bucket em vez da ACL uniforme porque o cabeçalho definido durante o upload especifica que ele é público. (Eu tinha uma ACL uniforme e defini todo o bucket como público)
Não tenho permissão para atualizar o OP, mas acho que ele deveria mencionar que, para que os buckets do Google funcionem, a conta de serviço precisa ter a função Proprietário Legado do Bucket de Armazenamento no bucket de backup e o bucket de upload precisa usar a ACL granular.
Espero que isso economize tempo para a comunidade.
Obrigado novamente a @Falco @pfaffman @gerhard @tuanpembual pela ajuda aqui.